... OPP material such as plastic bag machine,can be equipped with three-side sealing machine, ziplock bag machine, etc.2. Features:(1) Using ... welding, spot welding, etc. Bags that were welded by this machine look beautiful.(2) Strong and stable output power: piezoelectric ceramics ... easy to adjust.(6) Be compatible with automated machine or a bag machine and increase productivity.(7) It can be customized ...